US 6,182,496 B2 · Copper crusher gauge holder

Abstract

A copper crusher gauge holder for testing internal pressures of cartridges during test firing is provided. The copper crusher gauge holder has a circular aluminum upper plate and a circular aluminum lower plate having a layer of urethane rubber approximately ¾ inch thick sandwiched between the plates. The gauge holder is bored to hold copper crusher gauges and center-bored to fit over a cartridge centerline primer tube. A series of machine screws hold the plates together and allow for tightening the screws once the copper crusher gauge holder is in place in a cartridge to be tested. As the machine screws are tightened, the urethane rubber expands laterally gripping the inside of the cartridge and gripping the copper crusher gauges. A method to manufacture the gauge holder is provided.

Claims14

Dependent claims

A copper crusher gauge holder comprising:

an upper plate having a periphery, a plurality of first holes for receiving copper crusher gauges, a center bore hole for receiving a center primer tube, and a plurality of second holes for receiving machine screws;
a plurality of machine screws friction fitted into said plurality of second holes in said upper plate;
a lower plate having a periphery and a plurality of threaded holes for receiving said plurality of machine screws, said lower plate being attached to said upper plate with said plurality of machine screws such that a gap is formed between said upper and lower plates;
and
a pliant material filling said gap between said upper and lower plates out to said periphery of said upper plate and said periphery of said lower plate.

2 more elements

Dependencies are inferred from the claim text.

Copper crusher gauge holder

Life of this patent

Copper crusher gauge holder

Life of this patent

Abstract

Claims14